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In collaboration with Lars Buchhave (StarPlan, Copenhagen, Denmark), and optical engineer Julian Stuermer (University of Chicago), and with the help of Gabor Furesz (MIT) and Christian Schwab (Macquarie University, Australia), a preliminary optical design was made for a new fiber bundle for FIES, aimed for high RV stability while offering the same set of resolutions offered now. The new bundle will allow polarimetry fibers to be connected to the spectrograph, but the design for the bundle is separated from the polarimetry-channel design at the telescope end.